LPC MicrocontrollersのトピックRe: IAP copy RAM to Flash problem with 32KB sectors https://community.nxp.com/t5/LPC-Microcontrollers/IAP-copy-RAM-to-Flash-problem-with-32KB-sectors/m-p/524497#M7133 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by DF9DQ on Mon Apr 11 09:09:44 MST 2016</STRONG><BR /><SPAN>Calling "sector prepare" eight times is just fine. All the sector prepare call does is grant you permission for precisely one following erase/program operation.</SPAN><BR /><SPAN>For each 4K chunk you must ask for permission again.</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:08:15 GMT lpcware 2016-06-15T18:08:15Z IAP copy RAM to Flash problem with 32KB sectors https://community.nxp.com/t5/LPC-Microcontrollers/IAP-copy-RAM-to-Flash-problem-with-32KB-sectors/m-p/524496#M7132 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by mostafanfs on Mon Apr 11 08:48:47 MST 2016</STRONG><BR /><SPAN>LPC1778 has 30 sectors numbered sector #0 to sector #29 . The first 16th sectors (0 to 15) are 4KB wide and remains sectors are 32KB wide (16 to 28). Sector #29 is where bootloader functions resides. So we leave it just there. </SPAN><BR /><BR /><SPAN>Now I have new firmware in RAM in a 4KB buffer. There is no problem with 4KB sectors (0 to 15). First I prepare them for writing then simply copy buffer in RAM to the desired sector. And it works just fine. </SPAN><BR /><BR /><SPAN>Problem begins when I try to copy buffer in RAM into 32KB sectors (16 to 28). Because I have 4KB of data in RAM each time and when I prepare a sector for writing (say sector 16 which is 32KB) I can write to first 4KB of that sector. Then when I want to copy the next 4KB it returns that sector has not been prepared for writing which kind of makes sense considering I just wrote into its first 4KB address. </SPAN><BR /><SPAN>So I figured I call prepare function on a 32KB sector 8 times (that is 32/4 = 8). Each time before writing a 4KB into a 32KB sector. </SPAN><BR /><SPAN>But I think it's not the right thing to do because I believe it corrupts the data that has already been written to the sector whenever I try to prepare that sector for another 4KB writing. (because prepare function needs sector numbers NOT memory addresses)</SPAN><BR /><BR /><SPAN>So you see what I'm dealing with here. I'm gonna ask one more time. How can I copy 4KB data (size of buffer) from RAM into a 32KB sector correctly? </SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 18:08:14 GMT https://community.nxp.com/t5/LPC-Microcontrollers/IAP-copy-RAM-to-Flash-problem-with-32KB-sectors/m-p/524496#M7132 lpcware 2016-06-15T18:08:14Z Re: IAP copy RAM to Flash problem with 32KB sectors https://community.nxp.com/t5/LPC-Microcontrollers/IAP-copy-RAM-to-Flash-problem-with-32KB-sectors/m-p/524497#M7133 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by DF9DQ on Mon Apr 11 09:09:44 MST 2016</STRONG><BR /><SPAN>Calling "sector prepare" eight times is just fine. All the sector prepare call does is grant you permission for precisely one following erase/program operation.</SPAN><BR /><SPAN>For each 4K chunk you must ask for permission again.</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:08:15 GMT https://community.nxp.com/t5/LPC-Microcontrollers/IAP-copy-RAM-to-Flash-problem-with-32KB-sectors/m-p/524497#M7133 lpcware 2016-06-15T18:08:15Z Re: IAP copy RAM to Flash problem with 32KB sectors https://community.nxp.com/t5/LPC-Microcontrollers/IAP-copy-RAM-to-Flash-problem-with-32KB-sectors/m-p/524498#M7134 <HTML><HEAD></HEAD><BODY><SPAN>bump</SPAN></BODY></HTML> Sun, 19 Jun 2016 01:07:54 GMT https://community.nxp.com/t5/LPC-Microcontrollers/IAP-copy-RAM-to-Flash-problem-with-32KB-sectors/m-p/524498#M7134 lpcware 2016-06-19T01:07:54Z